Calculate the expansion of 10m of copper when heated 10°c to 80°(take linear expansivity of copper as 1•7×10^-5 k unit)

Answer 1

delta L / L = 1.7*10^-5 * (80-10)
delta L = 17 * 10^-5 * 70
= 490 * 10^-5 meters
= 4.9 * 10*-3 meters
= 4.9 millimeters or about half a centimeter.